phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('75b30f9f932662cb383ac9b43f31c48a', -1, 1713905941, 1713905941, '12759926', -7, 0, 0)

Line : 187
File : sessions.php